Economizer



v Aug.- l1, 1931. J. E. TRAINER ET AL 1,818,769

ECONOMI ZER 4 Smets-Sheet, 1

Filed Jan. l1,l 1928 Aug. 11, 1931. J. r:.l TRAINER ETAL EGONOMIZER Filed Jan. l1, 1928 4 Sheets-Sheet, 2

Waaaaaua ffm@ INVENTORS we gW/*J ATTORNEYJ Aug. 1l, 1931'. J. E. TRAINER ET AL ECONOMIZER Filed Jan. i1, 1928 4 sheets-sheet, 3

5 M 'xNvENToRs Aug- 171, 1931 J. E. TRAINER ET AL 1,818,759 l ECONOMIZER 1928 4 Sheets-Sheet, 4

Filed Jan. 1l

A ORNEYS Patented Aug. 11., 1931 UNITED STATES PATENT OFFICE JAMES E. TRAINER AND IVAR L. LANGVAND, OF BARBERTON, OHIO, ASSIGNOBS TO THE BABOOCK & WILCOX COMPANY, F BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY ECONOMIZER Application led January 11, 1928. Serial No. 245,970.

This invention relates to an`economizer in which the ends of the tubes are connected by return bends in such a manner that the joints are outside of the economizer walls and will be understood from the description in con'- nection with the-accompanying drawings in which Fig. 1 is a vertical section through an illustrative embodiment of the invent-ion; Fig. 2 is a, section along the line 2-2 of llo Fig. 1; Fig. 3 is a section similar to Fig. l

showing a modification; Fig. 4 is an end View showing one of the details; Fig. 5 is an enlarged sectional view showing supports for y the tubes 5 Fig. 6 is a side view correspond- 16 ing to Fig. 5; Fig. 7 is anl enlarged view showing tubes passing through the wall of the economizer; Fig. 8 is an enlarged view partly broken away showingsome of the details; and Fig. 9 is an end view corresponding to Fig. v8.

In the drawings, reference character 1 indicates rows of tubes, the ends of which are upset, as shown'at 2 in Fig. 8 to thicken the walls at the ends without substantial change of internal diameter. The end walls 3 of the economizer are provided with holes through which the tubes 1 extend. `A row of holes 4 is provided near the middle of each side wall of the economizer through which 3.0 holes the ends of supports 5 for the tubes 1 extend. A casing 6 is spaced a short distance from the walls of the economizer and return bends 8 and 9 are located inside the casing and outside of the leconomizer walls, andcon- "0 nectthe ends of each row of tubes to the ends ofthe next row, the tubes being staggered with respect to each other, as most clearly shown invF ig. 9. Alternate return bends 9 are longer than the others, so that a spanner 40 wrench can be inserted between the return bends and turn the nuts on bolts that attach the return bends to the tubes, as will be Ilnore fully described below; 4

The ends of the return bends 8 and 9 are threaded, as shown at -10 -(Fig. 8) and a.

flange 11 is threaded on each end of each return bend and may be spot welded thereto. The flanges are countersunk, as shown at 12, to accommodate the ends of the tubes 1. The upset or enlarged ends 2 of the tubes 1 vare threaded as shown at 13, and are also provided with flanges 14 corresponding to the Hanges\l1. Bolts 15 connect the flanges 11 and 14, and gaskets may be placed in the countersunk portion of the .flanges 11 between the ends of the tubes 1 and the ends of the return bends 8 and 9.

Return bends 16 and 17, somewhat longer than the bends 8 and 9, connect the lowermost row of tubes l to an inlet header 18. The lower ends of the bends 16 and 17 are provided with flanges 19 and bolts 21 that pass through the flanges l9 and screw into the header 18 force the ends of the return bends 16 and 17 into countersinks 21 in the header 18. Return bends similar to the return bends 16 and 17 connect the uppermost row of tubes 1 to the outlet header 22 and the outlet'header is connected to the boiler drum by mea-ns of the connection 23 in the usual manner.

The end walls 3 are made up of plate sections 25 of metal (Fig. 7) that are provided with bosses 26 corresponding to the tubes l, the sections being bolted together as indicated at 27. Holes 28 are provided through sections 25 and asbestos packing 31 is introduced into the countersunk portion of the hole 28 v'so that the rings 30 center the tubes 1 and keep them in place, permitting them to move longitudinally due to expansion and contrac- I and 6) are made up of pairs of strips 32 and 33 (Figs. 5 and 6), side by side that are provided with notches 34 along their upper edges. The notches 34 are somewhatvdeeper than half the diameter of the tubes 1 and one end of each notch 34 in the strip 32 is left with an overhanging lip 35 and the other ends of the notches 34 in the strip 33 are left with a similar overhanging lip so that when the strips are moved in opposite directions with the tubes 1 in the notches 34, the tubes will be clamped in place. The strips 32 and 33 are provided with transverse rectangular openings 36, one of which has an inward projection 37 along the end thereof, so that when a wedge 38 is driven into the openings 36, the strips 32 and 33 will be moved in opposite directions and clamp the tubes 1. Bolts 39 are provided for retaining the strips 32 and 33 in their clamping position after the wedge 38 has been inserted. The supports 5 near the middle of the tubes 1 cooperate with the return bends to prevent leakage from developing at the joints by flexing of the tubes. The supports 5 can be readily unloosened to permit removal of any injured tube.

In the modification shown in Fig. 3, an intermediate header 40 is connected to a row of tubes a few rows of tubes from the top, and is connected by means of the valved pipe 41 to the water space of the boiler drum 42, so that local circulation of water can take place through the upper rows of tubes while the boiler is being started up.

We claim:

1. In an economizer, rows of tubes connected by return bends, said tubes passing through gas tight openings in the walls of said economizer with the outside surfaces of said tubes contacting with the edges of said openings, said tubes being free to move longi# tudinally with respect to the walls due to expansion and contraction.

2. In an economizer, rows of tubes connected by return bends, said tubes passing through gas tight openings in the walls of said economizer with the outside surfaces of said tubes contactingwith the edges of said openings, said tubes being free to move lon gitudinally with respect to the walls due to expansion and contraction, said return bends being of different lengths.

3. In an economizer,- rows of tubes connected by return bends, said tubes passing through gas tight openings in the walls of said economizer and being free to move longitudinally with respect to the walls due to expansion and contraction, and adjacent return bends being of diil'erent lengths.

4. In Aan economizer, rows of tubes connected by return bends, said tubes passing through gas tight openings in the walls of said yeconomizer with the outside surfaces of said tubes contacting with the edges of said openings, said tubes being free to move 1011- gitudinally with respect to the walls due to expansion and contraction, and means near the middle of said tubes to prevent them from vibrating.

5. In an economizer, an upper and a lower header, rows of tubes connected to each other and to said headers by return'bends, said tubes passing through gas tight openings in the walls of said economizer with the outside surfaces of said tubes contacting with the edges of said openings, said tubes being free to move with respect to the walls due to eX- pansion and contraction.

6. In an economizer, rows of tubes con# nected by return bends, said tubes passing through gas tight openings in the walls of said economizer with the outside surfaces of said tubes contacting with the edges of said openings, said tubes being free to move longitudinally with respect to the walls due to expansion and contraction, said return bends being of different lengths, and flanges connected to said return bends.

7. In an economizer, rows of tubes connected by return bends, said tubes passing through gas tight openings in the walls of .said economizer with the outside surfaces of said tubes contacting with the edges of said Y 9. In an economizer, rows of tubes having upset ends, anges connected to said ends, and return bends of different lengths carrying anges adapted to be connected to the flanges on said tubes, said last named flanges having countersunk portions into which the ends of said tubes extend.

10. In an economizer, rows of tubes connected by return bends, said tubes passing through gas tight openings' in the walls of said economizer and thin rings in said openings on which said tubes rest.

11. In an economizer, rows of tubes having upset ends, elongated flanges connected to said ends, return bends of diierent lengths connecting said tubes, elongated. lian es on said return bends, the length of said anges turn ben s.

. 45 anges on sai between .the tube end anes and thevreturnl t joints with theY e tubes aligned with the boresof the return bends, the ,'ends of said tube's'ex'.-

i. 12. In an economizer, tubes having flanges at the ends thereof, return bends connecting said tubes, and velon ted flan es on said vreturn bends, the lengthsl of sald last named flanges being at an angle tothe planes of the return bends. 13. In an economizer,tubes having flanges atV the ends thereof, 'parallel return bends 1nclined to the. length of-said economizer, connecti-ng said tubes, andv elongated anges on said return bends, the lengths of said last named flanges being at an angle to the planes of .the returnv bends. y 4

14. In an economizer, tubes having fla at the ends thereof, .return bends connecting said tubes, an endo'f each last named Bange' projecting into the bend of an adjacent' return bend.

15. In an economizer, tubes having flanges at the ends thereof, and return-bends .con-

necting said tubes, the alternate return bends being longer than the others by an amount at :least as great as the approximate diameter of the tubular portion of a bend.

- 16. In an economizer, rows of. tubes having said tubes and a and bendshavingsubstantially the same bore, and means to provide joints at the ends of said tubes each having a portion ofjits surface substantially perpendicular to.y

portion at an angle to said first naxned portion. v 21. In an economizer, rows of tubes, return bends connecting ends of said tubes, said tubes and return bends having substantially* the same bore, and means to rovide jointsat the ends of said tubes each aving a ortion ofits surface substantially perpen icu` lar to said'tubes and a portion substantially parallel to said tubes.

JAMES E. TRAINER.

IVARLLANGVAM). l -L ends with thickened walls and substantially' uniform internal diameter, anges conn to said thickened wall ends, flanged return bends .outside of the walls of said economlzer v and means to connect the tube end flanges to the return bend flanges.

17. In an economizer, tubes having thickenedend walls, flanges attached to vsaid thickened end walls, return bend connectorshav y lingl substantially the same bore as said tubes,

flanges on said return bends, connections between the tube end ianges and the return bend flan esto make tight joints with the bores oft e tubes aligned with the bores of .40 the return bends.

- 18. In an economizer, tubes having thickened end walls, flanges attached to said thickened end walls, return bend c )nnectors'l1aving substantiall the same bore as said tubes,

return bends, connections bend anes' to make tig bores of t 6 0 tendi thick- V ened end walls, flanges attached tosai ytllickened end. walls return bend' connectors having substantialiy the same bore as said tubes,

on said return bends, connections be- 56 anges tween the tube end flangesv 'andthe return bend flanges to make tight joints with'the.

ed withthe bores of the return bends, said anges beingvao l0' that when the are drawn together they' will i bores of the tubes ali cause the en s of the tubes against the ends ofthe l the'body of one ofthe iiang'es'.

20. In an economizenrows of return 'es' bends connecting ends of said tubes, said,

lis 

